Repair procedures, tests, and adjustments
Manpack Transceiver 2110 series Repair Guide 103
Figure 33: Receive fault diagnosis flowchart 2
Is
RF at RX_AUDIO
1.2 V p–p?
Receive fault
diagnosis
flowchart 2
Yes
No
Check RF at Rx AUDIO
on RF/IF & Synthesiser
PCB
Check RF at RX_AUDIO
on Audio & Control PCB
Is
RF at Rx AUDIO
1.2 V p–p?
Yes
Replace RF/IF &
Synthesiser PCB
No
Check RF at
AUDIO_OUT_A/B on
Audio & Control PCB
Is RF
at AUDIO_OUT_A/B
1.2 V p–p?
Replace Audio &
Control PCB
Yes
No
Check and/or
replace ribbon cable
between RF/IF &
Synthesiser PCB and
Audio & Control PCB
Lower Front Panel
Assembly from chassis
Check RF at AF_OUT on
Front Panel PCB
Is
RF at AF_OUT
1.2 V p–p?
Check and/or
replace ribbon cable
J2 between Audio &
Control PCB and
Front Panel PCB
No
Yes
Check internal speaker is
switched on
Check audio between
P2 pins 2 and 3 on
Front Panel PCB
Is audio
between pins 2 and 3
1.2 V p–p?
Replace Front Panel PCBNo
Yes
Is
there an audible
tone?
Replace internal speakerNo
Yes
Check external speaker is
selected
Check audio between
J4 pins 8 and 18 on
Front Panel PCB
Is audio
between pins 8 and 18
1.2 V p–p?
Replace Front Panel PCBNo
Yes
Check and/or
replace Handset audio
connector on Front
Panel Assembly